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Share-Based Compensation
 9 Months Ended
Jul. 03, 2020
Share-based Payment Arrangement [Abstract]  
Share-based Payment Arrangement SHARE-BASED COMPENSATION
Stock Plans
As of July 3, 2020, we had 17.0 million shares available for issuance under our 2012 Omnibus Incentive Plan (as Amended and Restated) (the “2012 Plan”) and 3.6 million shares available for issuance under our Employee Stock Purchase Plan. Under the 2012 Plan, we have the ability to issue incentive stock options (“ISOs”), non-statutory stock options (“NSOs”), performance based non-statutory stock options, stock appreciation rights, restricted stock awards (“RSAs”), restricted stock units (“RSUs”), performance-based restricted stock units (“PRSUs”), performance shares and other equity-based awards to employees, directors and outside consultants. The ISOs and NSOs must be granted at a price per share not less than the fair value of our common stock on the date of grant. Options granted to date primarily vest based on certain market-based and performance-based criteria. Options granted generally have a term of four years to seven years. Certain of the share-based awards granted and outstanding as of July 3, 2020 are subject to accelerated vesting upon a change in control of the Company.
Share-Based Compensation
The following table shows a summary of share-based compensation expense included in the condensed consolidated statements of operations (in thousands):
 Three Months EndedNine Months Ended
 July 3,
2020		June 28,
2019		July 3,
2020		June 28,
2019
Cost of revenue$814  $651  $2,771  $2,165  
Research and development2,921  2,517  9,939  6,540  
Selling, general and administrative4,760  (353) 14,211  11,458  
Total share-based compensation expense $8,495  $2,815  $26,921  $20,163  
As of July 3, 2020, the total unrecognized compensation costs related to ISOs, RSAs and RSUs, including awards with time-based and performance-based vesting was $53.2 million, which we expect to recognize over a weighted-average period of
2.2 years. As of July 3, 2020, total unrecognized compensation cost related to our Employee Stock Purchase Plan was $0.8 million.

Stock Options
A summary of stock option activity for the nine months ended July 3, 2020 is as follows (in thousands, except per share amounts and contractual term):
Number of SharesWeighted-Average Exercise Price per ShareWeighted-Average Remaining Contractual Term (in Years)Aggregate Intrinsic Value
Options outstanding as of September 27, 2019376  $13.58  
Exercised(41) 4.12  
Forfeited, canceled or expired—  19.45  
Options outstanding as of July 3, 2020335  $14.73  7.03$6,834  
Options vested & expected to vest as of July 3, 2020335  14.73  7.036,834  
Options exercisable as of July 3, 202050  $14.40  3.07$1,037  
Aggregate intrinsic value represents the difference between our closing stock price on July 3, 2020 and the exercise price of outstanding, in-the-money options. The total intrinsic value of options exercised was $0.7 million and $1.0 million for the three and nine months ended July 3, 2020, respectively, and $0.1 million and $0.3 million for the three and nine months ended June 28, 2019, respectively.

Restricted Stock, Restricted Stock Units and Performance-Based Restricted Stock Units
A summary of RSAs, RSUs and PRSUs activity for the nine months ended July 3, 2020 is as follows:
Number of RSAs, RSUs and PRSUs
(in thousands)		Weighted-
Average
Grate Date Fair Value		Aggregate
Intrinsic
Value
(in thousands)
 Balance as of September 27, 20192,613  $21.81  $56,649  
Granted1,203  21.96  
Vested and released(636) 26.05  
Forfeited, canceled or expired(364) 22.19  
Balance as of July 3, 20202,816  $20.86  $98,909  
RSAs, RSUs and PRSUs that vested during the nine months ended July 3, 2020 and June 28, 2019 had combined fair values of $18.7 million and $10.9 million, respectively, as of the vesting date.